Movable Fingerprint Scanning for Rollable Display Device

2. The electronic device of claim 1, wherein the controller presents a visual prompt via the flexible display indicating the external finger area of the flexible display aligned with the fixed finger area of the device housing for receiving the fingerprint.

3. The electronic device of claim 1, wherein the controller activates the portion of the fingerprint scanner at the external finger area to capture the fingerprint.

5. The electronic device of claim 4, wherein the controller activates portions of the fingerprint scanner positioned over, and not extending beyond, the front side of the device housing to capture the uncropped image from areas of fingerprint scanner directly supported by the device housing.

6. The electronic device of claim 4, wherein the controller dynamically determines the external finger area based on identifying a fingerprint shape contained in the uncropped image.

7. The electronic device of claim 1, wherein the controller unlocks or activates a user interface presented on the flexible display in response to authenticating the user by identifying the fingerprint in the image as corresponding to the authorized user.

8. The electronic device of claim 1, further comprising at least one sensor communicatively coupled to the controller and configured to detect a user attending to the electronic device, and wherein the controller identifies the condition in which authentication of the user is required based on detecting a change from the user not attending to the electronic device to the user attending to the electronic device.

10. The method of claim 9, further comprising presenting a visual prompt indicating the external finger area of the flexible display aligned with the fixed finger area of the device housing for receiving the fingerprint.

11. The method of claim 9, further comprising activating the portion of the fingerprint scanner at the external finger area to capture the fingerprint.

13. The method of claim 12, further comprising activating portions of the fingerprint scanner positioned over, and not extending beyond, the front side of the device housing to capture the uncropped image from areas of fingerprint scanner directly supported by the device housing.

14. The method of claim 12, further comprising dynamically determining the external finger area based on identifying a fingerprint shape contained in the uncropped image.

15. The method of claim 9, further comprising unlocking or activating a user interface presented on the flexible display in response to authenticating the user by identifying the fingerprint in the image as corresponding to the authorized user.